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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 1392 | if ( count( $parts ) <= 2 ) { |
| 1393 | /** |
| 1394 | * Filter a sanitized filename string. |
| 1395 | * |
| 1396 | * @since 2.8.0 |
| 1397 | * |
| 1398 | * @param string $filename Sanitized filename. |
| 1399 | * @param string $filename_raw The filename prior to sanitization. |
| 1400 | */ |
| 1401 | return apply_filters( 'sanitize_file_name', $filename, $filename_raw ); |
| 1402 | } |
| 1403 | |
| 1404 | // Process multiple extensions |
| 1405 | $filename = array_shift($parts); |
| 1406 | $extension = array_pop($parts); |
| 1407 | $mimes = get_allowed_mime_types(); |
| 1408 | |
| 1409 | /* |
| 1410 | * Loop over any intermediate extensions. Postfix them with a trailing underscore |
| Line | Code |
| 1422 | break; |
| 1423 | } |
| 1424 | } |
| 1425 | if ( !$allowed ) |
| 1426 | $filename .= '_'; |
| 1427 | } |
| 1428 | } |
| 1429 | $filename .= '.' . $extension; |
| 1430 | /** This filter is documented in wp-includes/formatting.php */ |
| 1431 | return apply_filters('sanitize_file_name', $filename, $filename_raw); |
| 1432 | } |
| 1433 | |
| 1434 | /** |
| 1435 | * Sanitizes a username, stripping out unsafe characters. |
| 1436 | * |
| 1437 | * Removes tags, octets, entities, and if strict is enabled, will only keep |
| 1438 | * alphanumeric, _, space, ., -, @. After sanitizing, it passes the username, |
| 1439 | * raw username (the username in the parameter), and the value of $strict as |
| 1440 | * parameters for the 'sanitize_user' filter. |